Legal analysis: Shanghai's social security base over the years: for example, in 215, the upper limit was 16,353 yuan and the lower limit was 3,271 yuan; 216: the upper limit is 17,817 yuan and the lower limit is 3,563 yuan; 217: the upper limit is 19,512 yuan and the lower limit is 3,92 yuan. From July 1, 221, it will be adjusted to 5975 yuan/month, with the upper limit of 3114 yuan/month and the lower limit of 5975 yuan/month.

Legal basis: Social Insurance Law of the People's Republic of China

Article 12 The employing unit shall pay the basic old-age insurance premium in proportion to the total wages of its employees as stipulated by the state and record it in the basic old-age insurance pooling fund.

employees should pay the basic old-age insurance premium according to the proportion of their salary stipulated by the state and record it in their personal accounts.

individual industrial and commercial households without employees, part-time employees who have not participated in the basic old-age insurance in the employing unit and other flexible employees who have participated in the basic old-age insurance shall pay the basic old-age insurance premiums in accordance with state regulations and record them in the basic old-age insurance pooling fund and individual account respectively.

article 23 employees shall participate in the basic medical insurance for employees, and the employer and employees shall pay the basic medical insurance premiums in accordance with the state regulations.

individual industrial and commercial households without employees, part-time employees who have not participated in the basic medical insurance for employees in the employing unit and other flexible employees can participate in the basic medical insurance for employees, and individuals will pay the basic medical insurance premium according to state regulations.

article 35 an employer shall pay work-related injury insurance premiums according to the total wages of its employees and the rates determined by social insurance agencies.

article 44 employees shall participate in unemployment insurance, and the employer and employees shall pay unemployment insurance premiums in accordance with state regulations.

article 53 employees shall participate in maternity insurance, and the employer shall pay the maternity insurance premium according to the provisions of the state, while employees shall not pay the maternity insurance premium.